CN111811147B - Group control method, device and system of water heater and group control host - Google Patents
Group control method, device and system of water heater and group control host Download PDFInfo
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- CN111811147B CN111811147B CN202010494771.6A CN202010494771A CN111811147B CN 111811147 B CN111811147 B CN 111811147B CN 202010494771 A CN202010494771 A CN 202010494771A CN 111811147 B CN111811147 B CN 111811147B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
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- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
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Abstract
The group control method of the water heater comprises the steps of obtaining a user demand value of a user for the water heater, detecting working condition values of all external units of an external unit group of the water heater, and carrying out group control on the external unit group according to the user demand value and the working condition values. This application can realize outer quick-witted operating mode and user's demand and correspond the operation to outer quick-witted switching state in outer quick-witted group is adjusted according to outer quick-witted operating mode, can handle the conflict between changeable user demand and the outer quick-witted operating mode influence, realizes user's travelling comfort and the energy-conserving reliability of unit operation and does all.
Description
Technical Field
The application belongs to the technical field of group control of water heaters, and particularly relates to a group control method, device and system of water heaters and a group control host.
Background
Along with the rise of intelligent buildings, the inside group control of each electric device of many large-scale building, but the scheme of carrying out the group control to multi-functional hot water machine is still rare, because multi-functional hot water machine most all controls through the temperature, the interior outdoor phase is far apart, and for refrigerant connection, therefore it is comparatively difficult to design the group control scheme to, current hot water machine generally adopts inverter compressor, still has the problem of coordination during the design group control scheme.
In the related art, once problems such as insufficient water flow, refrigerant leakage, frequent starting and the like occur in the practical application of the multifunctional water heater group control system, the whole group control system has operation obstacles, or when the user demand changes, even if the group control host computer reacts to the user demand, each water heater still performs its own operation because a real control main point is not found, the purpose of group control cannot be achieved, and even the reliability of user experience and unit operation is influenced.
Disclosure of Invention
In order to overcome the problems that in the related art, once a problem occurs in the multifunctional water heater group control system in practical application, the whole group control system has operation obstacles, or when the user demand changes, even if the group control host computer reacts to the user demand, each water heater still works by itself because a real control main point is not found, the purpose of group control cannot be achieved, and even the user experience and the reliability of unit operation are influenced, the application provides a group control method, a device, a system and a group control host computer of the water heater.
In a first aspect, the present application provides a group control method for a water heater, including:
acquiring a user demand value of a user for the water heater;
detecting working condition values of all external machines of the external machine group of the water heater;
and performing group control on the outer cluster according to the user demand value and the working condition value.
Further, the user requirement value comprises: the current required water temperature; the working condition value comprises the inlet water temperature of the main pipe; the group control of the outer cluster according to the user requirement value and the working condition value comprises the following steps:
calculating the water temperature change rate according to the current required water temperature and the last required water temperature;
calculating a demand load rate according to the current demand water temperature and the main pipe inlet water temperature;
and controlling the starting, closing or keeping the current situation of an external machine in the external machine group according to the water temperature change rate and the demand load rate.
Further, the user requirement value comprises: the current required water temperature; the working condition values comprise a main pipe water inlet temperature and a compressor current value; the group control of the outer cluster according to the user requirement value and the working condition value comprises the following steps:
calculating the water temperature change rate according to the current required water temperature and the last required water temperature;
calculating the comprehensive load rate according to the current required water temperature, the total pipe inlet water temperature and the compressor current value;
and controlling the frequency of the external machine in the external machine group to be increased, reduced or kept in the current state according to the water temperature change rate and the comprehensive load rate.
Further, the controlling the external unit to start includes:
starting the corresponding outdoor units according to the address codes of the outdoor units; alternatively, the first and second electrodes may be,
detecting the current value of a compressor of the external unit, calculating the periodic load rate of the external unit according to the current value of the compressor, and starting the corresponding external units according to the periodic load rate.
Further, calculating the water temperature change rate according to the current required water temperature and the last required water temperature includes:
the ratio of the difference between the current required water temperature and the last required water temperature to the last required water temperature.
Further, calculating the demand load rate according to the current demand water temperature and the total pipe inlet water temperature, including:
calculating a target temperature difference in real time according to the current required water temperature and the current inlet water temperature of the header pipe;
and calculating the demand load rate in real time according to the target temperature difference and the current demand water temperature.
Further, the controlling the starting, the closing or the current situation of the external machine in the external machine group according to the water temperature change rate and the demand load rate includes:
if the sum of the water temperature change rate and the demand load rate is not less than 1, starting an external unit;
if the sum of the water temperature change rate and the demand load rate is between (0,1), keeping the current situation;
and if the sum of the water temperature change rate and the demand load rate is not more than 0, not starting the external unit or closing one external unit.
Further, the calculating a comprehensive load rate according to the current required water temperature, the total pipe inlet water temperature and the compressor current value includes:
acquiring the capacity of each outdoor unit;
calculating rated current of each outdoor unit according to the capacity of each outdoor unit;
and acquiring the real-time current of each outdoor unit, and calculating the comprehensive load rate according to the real-time current of each outdoor unit and the rated current of each outdoor unit.
Further, the calculating the comprehensive load rate according to the real-time current of each outdoor unit and the rated current of each outdoor unit includes:
calculating the total current required by the user demand;
calculating the load rate of the outdoor units according to the real-time current of each outdoor unit and the rated current of each outdoor unit;
calculating the total load rate according to the load rate of the outdoor unit and the total current required by user requirements;
and calculating the comprehensive load rate according to the load rate of the external unit and the total load rate.
Further, the calculating the total current required by the user demand includes:
acquiring real-time voltage and power supply power factor of a terminal group;
and calculating the total current required by the user according to the real-time voltage and the power factor of the power supply.
Further, the controlling the frequency of the external unit in the external cluster to increase, decrease or maintain the current status according to the water temperature change rate and the comprehensive load rate includes:
if the sum of the water temperature change rate and the comprehensive load rate is not less than a first power application coefficient, performing frequency boosting operation on the external machine;
if the sum of the water temperature change rate and the comprehensive load rate is between a first power application coefficient and a second power application coefficient, keeping the original frequency to operate;
and if the sum of the water temperature change rate and the comprehensive load rate is not greater than a second power application coefficient, performing frequency reduction operation on the external machine.
In a second aspect, the present application provides a group control device for a water heater, comprising:
the acquisition module is used for acquiring a user demand value of a user on the water heater;
the detection module is used for detecting the working condition value of each external machine of the external machine group of the water heater;
and the group control module is used for carrying out group control on the outer cluster according to the user required value and the working condition value.
In a third aspect, the present application provides a group control system for a water heater, comprising:
the system comprises an outer machine group, an inner machine group, a tail end group and a group control host machine;
the outer machine group is connected with the inner machine group;
the inner machine group is connected with the tail end group;
the group control host is respectively connected with the outer machine group, the inner machine group and the tail end group;
the group control host comprises a group control device of the water heater according to the second aspect.
In a fourth aspect, the present application provides a group control host, including:
a memory configured to be adapted to store a computer program;
a processor configured to be adapted to execute the computer program to implement the group control method of the water heater according to any one of the first aspect.
The technical scheme provided by the embodiment of the application can have the following beneficial effects:
according to the group control method, the device and the system for the water heater and the group control host provided by the embodiment of the invention, the user demand value of the user on the water heater is obtained, the working condition values of all the outdoor units of the outdoor unit group of the water heater are detected, and the group control is carried out on the outdoor unit group according to the user demand value and the working condition values, so that the conflict between the changeable user demand and the influence of the operation working condition of the outdoor unit can be processed, and the comfort of the user and the energy-saving reliability of the unit operation are realized.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.
Fig. 1 is a flowchart of a group control method for a water heater according to an embodiment of the present disclosure.
Fig. 2 is a flowchart of a group control method for a water heater according to another embodiment of the present disclosure.
Fig. 3 is a flowchart of a group control method for a water heater according to another embodiment of the present disclosure.
Fig. 4 is a flowchart of a group control method for a water heater according to another embodiment of the present disclosure.
Fig. 5 is a flowchart of a group control method for a water heater according to another embodiment of the present disclosure.
Fig. 6 is a functional block diagram of a group control device of a water heater according to an embodiment of the present disclosure.
Fig. 7 is a functional block diagram of a group control system of a water heater according to an embodiment of the present disclosure.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail below. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without making any creative effort, shall fall within the protection scope of the present application.
Fig. 1 is a flowchart of a group control method for a water heater according to an embodiment of the present disclosure, where as shown in fig. 1, the group control method for the water heater includes:
s11: acquiring a user demand value of a user for the water heater;
s12: detecting working condition values of all the outdoor units of the outdoor unit group of the water heater;
s13: and carrying out group control on the external machine group according to the user required value and the working condition value.
Most of the multifunctional water heaters are controlled by water temperature, the inner and outer machines are far apart and are connected by refrigerants, so that a group control scheme is difficult to design, and in practical application, when user requirements frequently change, even if a group control host computer reacts to the user requirements, because real control key points are not found, all the water heaters still do their own actions, so that the group control purpose cannot be achieved, and even the user experience and the reliability of unit operation are influenced.
In the embodiment, the user requirement value of the user on the water heater is obtained, the working condition values of the outdoor units of the outdoor unit group of the water heater are detected, and the conflict between the changeable user requirement and the influence of the operation working condition of the outdoor unit can be processed according to the user requirement value and the working condition values, so that the comfort of the user and the energy-saving reliability of the unit operation are realized.
An embodiment of the present invention provides another group control method for a water heater, as shown in a flowchart in fig. 2, the group control method for the water heater includes:
s21: acquiring the current required water temperature of a user on a water heater;
s22: detecting the inlet water temperature of a main pipe of each outer unit of an outer unit group of the water heater;
s23: calculating the water temperature change rate according to the current required water temperature and the last required water temperature;
in some embodiments, the water temperature change rate is the ratio of the difference between the current required water temperature and the last required water temperature to the last required water temperature, i.e. the water temperature change rate Δ Tx ═ in some embodiments (T1)t-T1t-60)/T1t-60。
S24: calculating a demand load rate according to the current demand water temperature and the main pipe inlet water temperature;
in some embodiments, calculating the demand load rate from the current demand water temperature and the mains inlet water temperature comprises:
calculating a target temperature difference delta T1 to be T1-T2 in real time according to the current required water temperature T1 and the current inlet water temperature T2 of the header pipe;
and calculating the demand load rate psi 1 ═ delta T1/T1 in real time according to the target temperature difference and the current demand water temperature.
S25: and controlling the starting, closing or keeping the current situation of the external machine in the external machine group according to the water temperature change rate and the demand load rate.
In some embodiments, controlling the external machines in the external machine group to start, shut down or maintain the current status according to the water temperature change rate and the demand load rate includes:
if the sum of the water temperature change rate and the demand load rate is not less than 1, starting an external machine;
if the sum of the water temperature change rate and the demand load rate is between (0,1), keeping the current situation;
if the sum of the water temperature change rate and the demand load rate is not more than 0, the outdoor unit is not started or closed, namely:
when psi 1 plus delta Tx is more than or equal to 1, starting an external machine;
when 0 is not less than psi 1 plus delta Tx is not more than 1, the current situation is kept;
and when psi 1 plus delta Tx is less than or equal to 0, the outdoor unit is not started or one outdoor unit is closed.
In some embodiments, the controlling the external unit to start includes, but is not limited to, the following modes:
the first method is as follows: starting the corresponding outdoor units according to the address codes of the outdoor units;
the second method comprises the following steps: detecting the current value of a compressor of the external unit, calculating the periodic load rate of the external unit according to the current value of the compressor, and starting the corresponding external units according to the periodic load rate sequence.
In the second mode, calculating the periodic load rate of the external unit according to the current value of the compressor, and sequentially starting the corresponding external units according to the periodic load rate includes:
calculating the load rate psi 2 of the external machine according to the current value data;
and calculating the periodic load rate of each outdoor unit according to the outdoor unit load rate psi 2.
Setting the capacity of an external machine to be Q1, Q2, Q3 and … Qn respectively;
the rated current of the outdoor unit is sn Q/(ucos theta 3-2), i.e. the rated current of each outdoor unit is sn1, sn2, sn3 and … snn,
wherein U is a user real-time voltage; cos theta is the user power factor;
acquiring real-time current of each external machine as sm1, sm2, sm3 and … smn;
calculating the external machine load rate psi 2 sm/sn, namely psi 21, psi 22, psi 23 and … psi 2n respectively;
calculating the cycle load rate psi 5:
wherein: t 2-t 3 is the short detection period of the outdoor unit;
i.e., the periodic duty ratios of each outdoor unit are ψ 51, ψ 52, ψ 53, … ψ 5n, respectively.
Sequencing the periodic load rate of each external unit, and starting the corresponding external units according to the sequence of the periodic load rates from small to large when the external units need to be started; and when the external units need to be closed, closing the corresponding external units in the order from large to small according to the periodic load rate.
The opening or closing sequence of the outdoor units is adjusted according to the periodic load rate of each outdoor unit, the outdoor units are opened preferentially when the outdoor units need to be started, the outdoor units with small periodic load rates are closed preferentially when the outdoor units need to be shut down, the optimal adaptation state of the multifunctional water heater system in the comfort and energy-saving operation can be achieved, and the use convenience is provided for users.
In the embodiment, the target temperature difference is calculated in real time according to the water inlet temperature required by the user and the current water inlet temperature of the main pipe, the demand load rate is calculated in real time according to the target temperature difference and the water inlet temperature required by the user, the starting, the closing or the keeping of the current situation of the external unit in the external unit group is controlled according to the demand load rate, the coordination relationship between the individual and the whole body can be considered, the conflict between the changeable user requirement and the influence of the operation working condition of the external unit is well treated, the whole system is enabled to operate in virtuous circle, and the user and.
An embodiment of the present invention provides another group control method for a water heater, as shown in a flowchart in fig. 3, the group control method for the water heater includes:
s31: acquiring the current required water temperature of a user on a water heater;
s32: detecting the main pipe water inlet temperature and the compressor current value of each outer machine of an outer machine group of the water heater;
s33: calculating the water temperature change rate according to the current required water temperature and the last required water temperature;
s34: calculating the comprehensive load rate according to the current required water temperature, the inlet water temperature of the header pipe and the current value of the compressor;
in some embodiments, as shown in fig. 4, the calculating the comprehensive load factor specifically includes:
s341: acquiring the capacity of each outdoor unit;
s342: calculating rated current of each outdoor unit according to the capacity of each outdoor unit;
s343: and acquiring the real-time current of each outdoor unit, and calculating the comprehensive load rate according to the real-time current of each outdoor unit and the rated current of each outdoor unit.
Wherein, calculate the comprehensive load rate according to each outer quick-witted real-time current and each outer quick-witted rated current of outer, include:
calculating the total current required by the user demand;
calculating the load rate of the outdoor units according to the real-time current of each outdoor unit and the rated current of each outdoor unit;
calculating the total load rate according to the load rate of the outdoor unit and the total current required by user requirements;
and calculating the comprehensive load rate according to the load rate of the external unit and the total load rate.
In some embodiments, calculating the total current required by the user demand comprises:
acquiring real-time voltage and power supply power factor of a terminal group;
and calculating the total current required by the user according to the real-time voltage and the power factor of the power supply.
The total current required by the user, S ═ (C Δ T1H ρ)/(U ·cosθ 3-2)
Wherein: wherein C is the specific heat capacity of water; h is nominal flow; u is the user real-time voltage; cos theta is the user power factor; ρ is the density of water.
For example, the capacity of the outdoor unit is set to Q1, Q2, Q3, … Qn;
the rated current of the outdoor unit is sn (Q)/U (cos θ 3-2), namely sn1, sn2, sn3 and … snn;
acquiring the real-time current of the external machine to be sm, namely sm1, sm2, sm3 and … smn;
calculating the external machine load rate psi 2 sm/sn, namely psi 21, psi 22, psi 23 and … psi 2n respectively;
calculating the total load rate psi 3 ═ sm1+ sm2+ sm3+ … snn)/S
Calculating a comprehensive load rate psi 4;
wherein: 0-t 1 is the detection short period of the external machine, and n is the number of the external machines being turned on.
S35: and controlling the frequency of the external machine in the external machine group to be increased, reduced or kept in the current state according to the water temperature change rate and the comprehensive load rate.
In some embodiments, controlling the frequency of the external unit in the external fleet to increase, decrease or maintain the current status according to the water temperature change rate and the comprehensive load rate includes:
if the sum of the water temperature change rate and the comprehensive load rate is not less than the first power application coefficient, performing frequency boosting operation on the external machine;
if the sum of the water temperature change rate and the comprehensive load rate is between the first power application coefficient and the second power application coefficient, the original frequency operation is kept;
if the sum of the water temperature change rate and the comprehensive load rate is not greater than the second power application coefficient, performing frequency reduction operation on the external machine, namely:
when psi 4 plus delta Tx is more than or equal to b, the external machine is subjected to frequency raising operation;
when a is not less than psi 4+ delta Tx is not less than b, the original frequency operation is kept;
when psi 4+ delta Tx is less than or equal to a, carrying out frequency reduction operation on the external machine;
wherein a and b are power application coefficients, and those skilled in the art can determine the power application coefficient value according to the actual test effect.
In some embodiments, as shown in fig. 5, the group control method of the water heater includes:
s51: starting up the external machine group for operation;
s52: detecting current value data of a compressor in the outer unit group;
s53: acquiring the change condition of user requirements, and adjusting the load of the external unit group according to the current value data and the change condition of the user requirements;
s54: adjusting the starting/closing rule of the outer machine group according to the current value data, and controlling the outer machine group according to the starting/closing rule;
s55: and the outer machine group is shut down.
In the embodiment, the frequency of the external units in the external unit group is controlled to be increased, the frequency of the external units is reduced or the current situation is maintained according to the comprehensive load rate and the water temperature change rate, so that each external unit can operate in the optimal state, the degree of freedom of each external unit is limited while each external unit is subjected to self demand control, the operation capacity of each module can be uniformly distributed according to the internal demand, and the comfort of users and the energy-saving reliability of unit operation are realized.
An embodiment of the present invention provides a group control device for a water heater, as shown in fig. 6, where the group control device for the water heater includes:
the acquisition module 61 is used for acquiring a user demand value of a user on the water heater;
the detection module 62 is used for detecting the working condition value of each outdoor unit of the outdoor unit group of the water heater;
and the group control module 63 is used for performing group control on the external cluster according to the user demand value and the working condition value.
The cluster control module 63 includes a first cluster control unit and a second cluster control unit, and the first cluster control unit is configured to control the starting, closing, or keeping the current status of the external machine in the external machine cluster according to the water temperature change rate and the demand load rate.
And the second group control unit is used for controlling the frequency of the external machine in the external machine group to be increased, the frequency of the external machine to be decreased or the current situation to be maintained according to the water temperature change rate and the comprehensive load rate.
In some embodiments, further comprising:
an external unit starting control module 64 for starting the corresponding external units according to the external unit address code sequence; or detecting the compressor current value of the external unit, calculating the periodic load rate of the external unit according to the compressor current value, and starting the corresponding external units according to the periodic load rate sequence.
In the embodiment, the user demand value of the user on the water heater is acquired through the acquisition module, the detection module detects the working condition value of each outer unit of the outer unit group of the water heater, the group control module performs group control on the outer unit group according to the user demand value and the working condition value, the corresponding operation of the total load and the current value of the outer unit group is realized, the opening or closing of the outer unit in the outer unit group is adjusted according to the current value data, the conflict between the changeable user demand and the influence of the operation working condition of the outer unit can be processed, and the comfort of the user and the energy-saving reliability of the unit operation are realized.
An embodiment of the present invention provides a group control system of a water heater, as shown in fig. 7, which includes:
an outer cluster 71, an inner cluster 72, a tail end cluster 73 and a group control host 74;
the outer cluster 71 is connected with the inner cluster 72;
the inner cluster 72 is connected with the end cluster 73;
the group control host 74 is connected with the outer cluster 71, the inner cluster 72 and the tail end cluster 73 respectively;
the group control host 74 includes a group control device of the water heater as described in the previous embodiment.
The embodiment of the invention provides a group control host, which comprises:
a memory configured to be adapted to store a computer program;
a processor configured to be adapted to execute the computer program to implement the group control method of the water heater as described in the above embodiments.
It should be noted that the group control method, device, system and host of the water heater described above belong to a general inventive concept, and the contents in the embodiments of the group control method, device, system and host of the water heater are applicable to each other.
It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.
It should be noted that, in the description of the present application, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Further, in the description of the present application, the meaning of "a plurality" means at least two unless otherwise specified.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and the scope of the preferred embodiments of the present application includes other implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present application.
It should be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present application may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.
It should be noted that the present invention is not limited to the above-mentioned preferred embodiments, and those skilled in the art can obtain other products in various forms without departing from the spirit of the present invention, but any changes in shape or structure can be made within the scope of the present invention with the same or similar technical solutions as those of the present invention.
Claims (13)
1. A group control method of a water heater is characterized by comprising the following steps:
acquiring a user demand value of a user for the water heater;
detecting working condition values of all external machines of the external machine group of the water heater;
performing group control on the outer cluster according to the user required value and the working condition value;
the user demand value includes: the current required water temperature; the working condition value comprises the inlet water temperature of the main pipe; the group control of the outer cluster according to the user requirement value and the working condition value comprises the following steps:
calculating the water temperature change rate according to the current required water temperature and the last required water temperature;
calculating a demand load rate according to the current demand water temperature and the main pipe inlet water temperature;
and controlling the starting, closing or keeping the current situation of an external machine in the external machine group according to the water temperature change rate and the demand load rate.
2. The group control method of the water heater according to claim 1, wherein the user demand value comprises: the current required water temperature; the working condition values comprise a main pipe water inlet temperature and a compressor current value; the group control of the outer cluster according to the user requirement value and the working condition value comprises the following steps:
calculating the water temperature change rate according to the current required water temperature and the last required water temperature;
calculating the comprehensive load rate according to the current required water temperature, the total pipe inlet water temperature and the compressor current value;
and controlling the frequency of the external machine in the external machine group to be increased, reduced or kept in the current state according to the water temperature change rate and the comprehensive load rate.
3. The group control method of the water heater according to claim 2, wherein the controlling of the starting of the outdoor unit comprises:
starting the corresponding outdoor units according to the address codes of the outdoor units; alternatively, the first and second electrodes may be,
detecting the current value of a compressor of the external unit, calculating the periodic load rate of the external unit according to the current value of the compressor, and starting the corresponding external units according to the periodic load rate.
4. The group control method of the water heater according to claim 1 or 2, wherein the calculating of the water temperature change rate according to the current required water temperature and the last required water temperature comprises:
the ratio of the difference between the current required water temperature and the last required water temperature to the last required water temperature.
5. The group control method of the water heater according to claim 1, wherein the calculating the demand load rate according to the current demand water temperature and the main pipe inlet water temperature comprises:
calculating a target temperature difference in real time according to the current required water temperature and the current inlet water temperature of the header pipe;
and calculating the demand load rate in real time according to the target temperature difference and the current demand water temperature.
6. The group control method of the water heater according to claim 1, wherein the controlling of the external machines in the external machine group to start, shut down or maintain the status according to the water temperature change rate and the demand load rate comprises:
if the sum of the water temperature change rate and the demand load rate is not less than 1, starting an external unit;
if the sum of the water temperature change rate and the demand load rate is between (0,1), keeping the current situation;
and if the sum of the water temperature change rate and the demand load rate is not more than 0, not starting the external unit or closing one external unit.
7. The group control method of the water heater according to claim 2, wherein the calculating of the integrated load factor according to the current required water temperature and the total pipe inlet water temperature and the compressor current value comprises:
acquiring the capacity of each outdoor unit;
calculating rated current of each outdoor unit according to the capacity of each outdoor unit;
and acquiring the real-time current of each outdoor unit, and calculating the comprehensive load rate according to the real-time current of each outdoor unit and the rated current of each outdoor unit.
8. The group control method of the water heater according to claim 7, wherein the calculating of the comprehensive load factor according to the real-time current and the rated current of each outdoor unit comprises:
calculating the total current required by the user demand;
calculating the load rate of the outdoor units according to the real-time current of each outdoor unit and the rated current of each outdoor unit;
calculating the total load rate according to the load rate of the outdoor unit and the total current required by user requirements;
and calculating the comprehensive load rate according to the load rate of the external unit and the total load rate.
9. The group control method of the water heater according to claim 8, wherein the calculating the total current required by the user demand comprises:
acquiring real-time voltage and power supply power factor of a terminal group;
and calculating the total current required by the user according to the real-time voltage and the power factor of the power supply.
10. The group control method of the water heater according to claim 2, wherein the controlling the outdoor units in the outer fleet to increase frequency, decrease frequency or maintain the status according to the water temperature change rate and the comprehensive load rate comprises:
if the sum of the water temperature change rate and the comprehensive load rate is not less than a first power application coefficient, performing frequency boosting operation on the external machine;
if the sum of the water temperature change rate and the comprehensive load rate is between a first power application coefficient and a second power application coefficient, keeping the original frequency to operate;
and if the sum of the water temperature change rate and the comprehensive load rate is not greater than a second power application coefficient, performing frequency reduction operation on the external machine.
11. A group control device of a water heater is characterized by comprising:
the acquisition module is used for acquiring a user demand value of a user on the water heater, and the user demand value comprises the following steps: the current required water temperature;
the detection module is used for detecting working condition values of all the external units of the external unit group of the water heater, wherein the working condition values comprise the inlet water temperature of a main pipe;
the cluster control module is used for carrying out cluster control on the outer cluster according to the user demand value and the working condition value, and comprises the following steps:
calculating the water temperature change rate according to the current required water temperature and the last required water temperature;
calculating a demand load rate according to the current demand water temperature and the main pipe inlet water temperature;
and controlling the starting, closing or keeping the current situation of an external machine in the external machine group according to the water temperature change rate and the demand load rate.
12. A group control system for water heaters, comprising:
the system comprises an outer machine group, an inner machine group, a tail end group and a group control host machine;
the outer machine group is connected with the inner machine group;
the inner machine group is connected with the tail end group;
the group control host is respectively connected with the outer machine group, the inner machine group and the tail end group;
the group control host comprises a group control device of the water heater as claimed in claim 11.
13. A group control host, comprising:
a memory configured to be adapted to store a computer program;
a processor configured to be adapted to execute the computer program to implement the group control method of the water heater according to any one of claims 1 to 10.
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| CN112629022B (en) * | 2020-12-21 | 2022-03-01 | 珠海格力电器股份有限公司 | Multi-split water heater control method and device and multi-split water heater |
| CN112944561B (en) * | 2021-02-09 | 2023-03-28 | 青岛海尔空调电子有限公司 | Control method of air conditioning unit |
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